Russian telecom companies will have to re-route all Internet traffic to exchange points managed or approved by the Russian telecom supervisor Roskomnazor.
Russia has constantly stoked fears about the web, which President Vladimir Putin regards as a CIA invention.
Across Russia, young people are dancing in solidarity with a group of aspiring pilots threatened with punishment for recording themselves dancing in their underwear.
Russia's recent legislation has placed demands on the location of servers that have already ousted LinkedIn, in what could be a precursor to bigger networks.
One of the world's largest porn sites has introduced mandatory logins in Russia, synced with users' social media.
No country allows limitless "quasi-freedom" online, the Russian leader said.
VKontakte has apparently been breached and a hacker is trying to sell the logins.
A new draft demands state employees brief bosses on information they have shared online.
"Someone like Putin, so full of strength, someone like Putin who doesn't get drunk."
German Klimenko insists U.S. companies will have to comply with Russian law eventually.
The future of social media websites in Russia depends on "whether or not they cooperate with law enforcement authorities", Vladimir Putin's online advisor said.
President Petro Poroshenko becomes 2016's first unlikely cover star.